Gamete represents the sex cell or germ cell in sexual reproduction. There are two types of gametes, male and female.
Zygote is the product of fertilization in which a male and a female gamete fuse with each other. The two fusing gametes possess characters of their parents in their DNA. Fertilization brings characters of both parents into one zygote cell. Zygote is the first cell of the next generation. It divides to form an embryo which subsequently grows into a new individual.